Since SQ seems to your primary goal, i'll break some options down using an optimized sealed enclosure for each option.
Speaker..Brahma........2 PB12s........Brahma
Power....1200w.........600w...........2400w
20hz......98.6 dB.......99.3 dB.......101.6 dB
30hz.....105.6 dB......106.4 dB.......108.3 dB
40hz.....110.1 dB......111.2 dB.......113.1 dB
50 hz....112.8 dB......114.4 dB.......115.8 dB
max spl..115.4 dB......119.1 dB.......118.4 dB
Just a graph so you compare output at different freq. If you were to go with an SPL system, htere is no doubt that the Adire is the better sub. The Lambda's are the cheapest and have more output than the Brahma in the above scenario. If you can add more power, the Brahma starts to come into it's own as probably the best sub on the market.
